HAP. in.] THE CRUISES OF THE 'PORCUPINE: 101 



The scientific staff consisted of Dr. Carpenter, 

 iVIr. P. Herbert Carpenter (who had gone through his 

 tpprenticeship in making analyses under unfavourable 

 drcumstances in the former cruise with Mr. Hunter, 

 ind was now prepared to undertake this task on his 

 >wn account), and myself; and our intention was, in 

 iccordance with our original programme, to go care- 

 ully over again the region which we had examined 

 n the ' Lightning,' to test with better appliances and 

 aore trustworthy instruments the singular distri- 

 >ution of temperatures in the c warm ' and ' cold ' 

 ireas, to map out as accurately as we could the 

 >aths of the warm and cold currents, and to deter- 

 nine the influences of these currents upon the 

 Character and distribution of animal life. 



We left Stornoway on the afternoon of Sunday 

 ,he 15th of August, and made straight for the scene 

 f our most successful c warm area ' dredging of the 

 ear before. We were equally successful on this 

 occasion, and procured several good specimens of 

 loltenia, and a beautiful series of Ilyalonema, ranging 

 L'om 2 mm. in length up to 30 and 40 centimetres, 

 nd thus giving all the stages in the development of 

 he wonderful ' glass rope/ and proving to demon- 

 tration its relation to the body of the sponge 

 )r. J. E. Gray's so-called Carteria. 



The most interesting novelty however which re- 

 r arded us was a very fine Echinid belonging to the 

 Maridae to which I had given the name Porocidaris 

 urpurata (Eig. 11). I believe I am justified in 

 3ferring this handsome species to the genus Poroci- 

 aris, although in it the special character is absent 

 a which that genus was founded by Desor. Some 



